Prestressed Modal Analysis

- October 11, 2019 at 12:44 pm
  stranalyst
  Subscriber
  How can I run a prestressed modal analysis using its input file (ds.dat) using a HPC system/cluster? When I try to run, I get following error even I copied .rst and .rdb files to the directory in cluster where the batch file and input file exist. Should I add additional commands to the input file for modal analysis?
```
PERFORM A STATIC ANALYSIS

  RESTART WILL BE PERFORMED FOR THE ANALYSIS OF LINEAR PERTURBATION


 *** ERROR ***                           CP =       7.360   TIME= 15:27:49

 During the multiframe restart process, neither the .RDB file nor the    

 .Rn files were found.  Both files are required to perform the         

 multiframe restart for the linear perturbation analysis.  You must use  

 the RESCONTROL,LINEAR command in the prior base analysis.  The          

 ANTYPE,,RESTART command is ignored.       
```
- October 16, 2019 at 5:13 am
  
  Sandeep Medikonda
  Ansys Employee
  
  Try using the /COPY command the way it was done in this verification manual:
  
  https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v195/ans_vm/Hlp_V_VM26TXT.html
- October 21, 2019 at 2:25 pm
  
  stranalyst
  Subscriber
  
  Thanks Sandeep for your help. I have solved the problem. I just realized that the name of static analysis result files needed for the restart and the jobname specified in the batch file should be identical. Otherwise, I get the error shown above.